OnePlus Ace 6 Ultra vs REDMI K90 Max

The OnePlus Ace 6 Ultra scores 7.8 in our rating, and the REDMI K90 Max scores 8.0. The OnePlus Ace 6 Ultra leads in battery, while the REDMI K90 Max is ahead in display and camera. The OnePlus Ace 6 Ultra is the newer phone, announced Apr 28, 2026.

2 of 4 phones Clear all

OnePlus OnePlus Ace 6 Ultra

7.8 Price TBA

REDMI REDMI K90 Max

8.0 Price TBA

Top score

Key differences

Why choose the OnePlus Ace 6 Ultra

Bigger battery 8,600 mAh vs 8,550 mAh
Faster wired charging 120 W vs 100 W
Brighter screen 3,600 nits vs 3,500 nits
Better water resistance IP68 + IP69K vs IP68 + IP69
Newer model Apr 28, 2026 vs Apr 21, 2026
Lighter 217 g vs 227 g

Why choose the REDMI K90 Max

Bigger screen 6.83 inches vs 6.78 inches
Thinner 8.18 mm vs 8.45 mm
Higher-resolution video 8K@30 vs 4K@60
Higher screen resolution 1280 × 2772 px vs 1272 × 2772 px
Better selfie video 1080p@60 vs 1080p@30

PhoneRanked scores

Calculated from specs, relative to phones from the same year and price range. How we rate phones

Value for money marked “est.” is an estimate: that phone has no official US launch price, so it is not highlighted against the others.

Spec OnePlus Ace 6 UltraREDMI K90 Max

Overall 7.8 8.0

Display 8.4 8.7

Performance 8.9 8.9

Camera 6.0 6.6

Battery 7.8 7.6

Design 8.8 8.8

Software support 3.5 3.5

Value for money 5.0 est. 5.0 est.

Display

Spec OnePlus Ace 6 UltraREDMI K90 Max

Size 6.78 inches 6.83 inches

Type OLED OLED

Resolution 1272 × 2772 px 1280 × 2772 px

Pixel density 450 ppi 447 ppi

Refresh rate 165 Hz 165 Hz

Adaptive refresh ✕ No —

Peak brightness 3,600 nits 3,500 nits

HDR — HDR10+, Dolby Vision, HDR Vivid

Protection Crystal Shield Glass —

Performance

Spec OnePlus Ace 6 UltraREDMI K90 Max

Chipset Dimensity 9500 Dimensity 9500

Process 3 nm 3 nm

Max CPU clock 4.21 GHz 4.21 GHz

GPU Arm Mali-G1-Ultra MC12 Arm Mali-G1 Ultra MC12

RAM 12 GB / 16 GB 12 GB / 16 GB

Storage 256 GB / 512 GB / 1 TB 256 GB / 512 GB / 1 TB

Storage type UFS 4.1 UFS 4.1

microSD slot ✕ No ✕ No

Cameras

Spec OnePlus Ace 6 UltraREDMI K90 Max

Main camera 50 MP, f/1.8 50 MP, f/1.68, 1/1.55"

Optical stabilization ✓ Yes ✓ Yes

Ultrawide 8 MP 8 MP

Rear cameras 2 2

Rear video 4K@60 8K@30

Front camera 16 MP 20 MP

Front video 1080p@30 1080p@60

Battery and charging

Spec OnePlus Ace 6 UltraREDMI K90 Max

Capacity 8,600 mAh 8,550 mAh

Battery type — Li-Po

Wired charging 120 W 100 W

Reverse wireless ✕ No ✕ No

Charger in box ✓ Yes ✓ Yes

Design and build

Spec OnePlus Ace 6 UltraREDMI K90 Max

Dimensions 162.45 × 77.47 × 8.45 mm 162.91 × 77.93 × 8.18 mm

Thickness 8.45 mm 8.18 mm

Weight 217 g 227 g

Form factor Bar Bar

Frame Aluminum Aluminum

Back Glass —

Water resistance IP68 + IP69K IP68 + IP69

Fingerprint Under-display ultrasonic Under-display ultrasonic

3D face unlock ✕ No ✕ No

SIM Dual Nano-SIM Dual Nano-SIM

Colors Ace Awakening, Metal Storm Shadow Black, Sky Blue, Space Silver

Connectivity and features

Spec OnePlus Ace 6 UltraREDMI K90 Max

5G ✓ Yes ✓ Yes

Wi-Fi Wi-Fi 7 Wi-Fi 7

Bluetooth 6.0 5.4

USB USB-C 2.0 —

NFC ✓ Yes ✓ Yes

3.5 mm jack ✕ No ✕ No

Stereo speakers ✓ Yes ✓ Yes

Satellite ✕ No ✕ No

IR blaster ✓ Yes ✓ Yes

Software

Spec OnePlus Ace 6 UltraREDMI K90 Max

OS at launch Android 16 Android 16

Interface ColorOS 16 Xiaomi HyperOS 3

Launch and price

Spec OnePlus Ace 6 UltraREDMI K90 Max

Announced Apr 28, 2026 Apr 21, 2026

Released — Apr 21, 2026

Status Released Released

Green marks the stronger value in a row. Specs come from official manufacturer data, cross-checked with established tech media; each phone page lists its sources. Report an error

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